package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * 判断套餐是否绑定
 * 菜品
 * 或者套餐
 * 如果绑定的话不能删除
 *
 */
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;


    @Override
    public void remove(Long id) {
        /**
         * 判断是否关联菜品
         * @param id
         */
        LambdaQueryWrapper<Dish> dishlqw = new LambdaQueryWrapper<>();
        dishlqw.eq(Dish::getCategoryId, id);
        int discount = dishService.count(dishlqw);
        if (discount > 0) {
            throw new CustomException("当下关联了菜品不能删除");
        }


        /**
         * 判断是否关联套餐
         */
        LambdaQueryWrapper<Setmeal> setlqw = new LambdaQueryWrapper<>();
        setlqw.eq(Setmeal::getCategoryId, id);
        int setcount = setmealService.count(setlqw);
        if (setcount > 0) {
            throw new CustomException("当前分类关联了套餐不能删除");
        }

        //直接删除
        removeById(id);
    }
}
